html{
    font-size: 80px;
}
body{
    font-size: 14px;
}
/*手机尺寸*/
@media screen and (max-width: 749px){
    html{
        font-size: 50px;
    }
}
@media screen and (min-width: 750px) and (max-width: 1199px) {
    html{
        font-size: 60px;
    }
}
@media screen and (min-width: 1200px) and (max-width: 1500px) {
    html{
        font-size: 70px;
    }
}
@media screen and (min-width: 1501px) and (max-width: 1900px) {
    html{
        font-size: 80px;
    }
}
@media screen and (min-width: 2000px) and (max-width: 2999px) {
    html{
        font-size: 100px;
    }
}
@media screen and (min-width: 3000px){
    html{
        font-size: 200px;
    }
}